GJYFJH - Tight buffered fibres are surrounded with a layer of aramid yarns as the strength member. A LSZH inner sheath is extruded on the tight buffered fibre to form an optical sub-unit. Then optical sub-units and fillers are stranded into a cable core. Finally, a LSZH sheath is extruded outside the core. The fillers can be made of other high-strength yarns and other sheath materials are available on request.